Burner for vulcanizers



W. FROST.

BURNER FOR VULCANZERS.

APPLICATION man MAR. l. 1920.

Patented Aug. 16, 1921.

2 SHEETS-SHEET l.

W. FROST.

BURNER FOR VULCANIZERS.

APPLICATION HLED MAR. I. 1920.

1,388,032. PatentedAug.1'6,1921.

2 SHEETS-SHEET 2.

" l ll |ll llllll UNITED STATES PATENT, Omer.,

WILLIAM FROST, vOE LONDON, ENGLAND, AssIeNOR To HARVEY ERosT & cor/fram?,-`

I lLIMITED, OF LONDON, ENGLAND. f Y

BURIIWIEIR` FOR VULCANIZERS.

To all whomy t may concern: y

Be it known that I, WILLIAM Fnos'r, ay subject of the King of England, residing at London, England, have invented certain new and useful Improvements in Burners for Vulcanizers, of which the following is a specification.

This'inventionis for improvements in or relating to vulcanizers of the type wherein the steam-generation is effected by a burner having a wick or its equivalent, such as a gauze sheet, fed withliquid-fuel, such for example asinethylatedspirit.

The main object of this invention is to provide a construction of vulcanizer whose burner control shall be e-ffective yin operation and shall operate quickly when actuated.

Another lobject is to provide a control for the burner which can be brought initially into one of a number of adjusted positions to regulate the burner when the latter started In these vulcanizers, it has been lthe practice to provide a membermovable to regulate the heat or extinguish the burner, such member for example, covering and uncover` ing the orificepof the burner. The regulation can also be effected by' controlling the airsupply to the burner or the outlet-fines therefrom.

According to this invention there is provided in a burner of the type described for a vulcanizer, the combination with a member that'is mounted to` slide to regulate or extinguish the burner, of a yielding-control which tends always to move the member so as to reduce or extinguish the heating` effect y Vchamber 11 from the chamber 12 tothe up-l of the burner, and retaining` means to holdl it back against the 'yielding-control, which means is automatically operated by thevuI- canizer, (for example by the steam-pressure or temperature generated therein), to release the member. f.

According to another feature of the invention, there is provided incombination with a slidably mounted controlling-member that is frictionally held against its yielding-control, of means such asa bip-metallicy spring or a flexible diaphragm, normally exerting pressure to produce the desired .fric-y tion, but so arranged that the heating of the vulcanizer reduces the said pressure to release the controlling member; the said `re- "Specification of Letters Patent. Patented Aug-.16., 1921. .Application led March 1, i

ieao. serial No, 362,180.

perature, or by exerting steam pressurev on i the diaphragm tomove it.` l .4

Other' features' ofthe invention will 4be herelnafter described, and the novel detailsl pointed out in thevclaims. m l

In thel accompanying drawings, which illustrate various embodiments of this invention,

Figure 1 is a' one embodiment; y

2 is a side view in centralsection of Fig. 3V is a fragmentary enlarged sectional view of the spring yof Fig. 2; f

41 is a view similar to Fig. 2 illustrating a modication .and

perspective view.v showing Fig. 5 is a longitudinal central section of y another modified construction.

Like reference characters indicate ylike parts throughout the drawings.

Referring erst to rigs. i and 2, the; device Y comprises a casing. 10 dividedinto upper and lower chambers r11, 12 respectively, the

upper chamberv 11,` constituting the water and steamspace,and the rvspacelQ constituting kthe burner chamber. The burner is illustrated as a cylindricalcasing 13, packed withl an absorbent material Vandfhaving an gauze. With this burner methylated spirit or other suitable material' is used is lmounted in circular openings in the vside walls lof theV casingA 10, being retained? in place by a notched 1ug`15, engaging av pin or screw 16, as shown in Fig. 1. i

A number of pipes 17 extend through the per end where they are'open to atmosphere, and these tubes constitute the flues whereby` the productsof combustion pass away from the burner and giveuptheir heat to the water in the chamber 11. The air inlet to the'v :can slide relatively to the casing. duction' in pressure can bey obtained by de- `forming the spring by increasing its tem--y metallic bow-spring 33 is lmountedon the pins 32 so astov press' the part 30 against ,opening 14 in the side.coveredwith wire, l

y as thefuel` i `1n the known manner andthe whole burner the wall of the casing 1() and hold it frictionallyin any position to which it maybe adjusted. This spring is conveniently inclosed in a casing or box formed on the part 80 and covered by a plate 34. The part 8O further carries at its lower end `a platewhich is adapted to cover the openings 18 when the shutter-member 30 is down in its lowest position, and it also carries a plate 3G, which, in this position, covers the upper ends of the tubes 17.

In Fig. 3, the spring 33 is bimetallic and is so arranged that it exerts its pressure by virtue of its curved shape, and the metal having the greater expansion coefficient is placed on the concave side so that when the spring becomes heated by conduction through the wall of the steam chamber, it tends to straighten, this being facilitated by the freedom'of the pins 32 in the slots 33a, and thereby reduces the pressure which it exerts on the member 30.

- ,In the operation of this device the shutter is opened to any desired extent and the burner is lighted. When the requisite temperature for` vulcanization has been attained by the steam in the chamber 11, the spring 33'operates in the manner above described, to release the frictional hold ,on the shuttermember 30 so that the latter falls and closes the air-inlets 18 and the outlets 17, thereby extinguishing the burner landy preventing any further undesirable rise of temperature.

It isobvious that the burner need not be completely extinguished as` the shutters could `be arranged so as merely to diminish the heating efi'ect of the burner instead of 'completely, extinguishing it.

In the modified construction illustrated in v Fig..4, the device is similar as to. theA major-j ity of the parts, these parts being indicated by the same reference characters as in Figs. 1 and 2. The modifications consist inthe constructiony and arrangement of the slid-v ing-shutter; 'in this case a plate 40 fits against the side wall of the chamber 10, conveniently, being of the same dimensions as that wall. The lower ,portion 43`is adapted to controlthe air-inlets'18, and a fiange or plate 44 at the top controls the fines 17 in the manner hereinbefore described. This plate 40.is mounted to slide on the face of the casing 10, being guided by screws '41, engaging slots 42 in the plate 40. A notch or recess is provided in the wall of the chamber 10 anda bimetallic springy 39y of bowed formationis mounted therein. Thisspring is similar to the spring 33 previously described, and operates in the same manner except that it presses the plate -40 outwardA against the heads of the screws 41 to. provide the frictional retaining grip.

In both these constructions the springis adjusted to, operate at' the desired tempera- `ture by stressing it in position by any convenient means. As shown in Fig. 2, the ends of the springs are seated against adjustable nuts on the pins 32. 1n the construction illustrated in Fig. 4, the same arrangement may be used, t'. e. adjustment can be effected by providing two adjusting screws similar to those in Fig. 2, or if desired, only a single adjusting screw may be used at one end.

The operation of this device is similar to that already described, and neednot be repeated.

In Lthe modified construction illustrated in Fig. 5, the device comprises a burnerchamber 50, a water and steam chamber 51, and tubes 52, serving as the outlet fiues from the burner similar to the constructions already described. The burner 58 is also similar, but it is controlled by a sliding cylindrical shutter 54, which is movable longitudinally of the cylindrical burner 53, to cover the orifice 55 from which the iiame issues. This shutter 54 is controlled by springs 56 which tend to bring it into its closed position. A detent 57 is provided to engage a notch or notches 58 formed in a bar 59 secured on the shutter 54 and to hold it against j the returning actionof the springs 56, and this detent is operated, that is to say lifted out from its notch 58, by any convenient device whereof the action is determined by the pressure or temperature existing in the `steam-chamber 51.

Va bimetallic rod controlled by the temperature existing in the steam-chamber could be used to release the detent.

ln other details. the operation of this device is similar to that already described and therefore need not be repeated.l

It will be appreciated that in all the constructions hereinbefore described, the con` trolling-shutter can be opened to.y any desired degree and retained therein untill released by the automatic control. In the case of the construction illustrated in Fig. 5, instead of a series of notches to engage the detent, an adjustable stop may be provided,y

this stop being adjustable along the bar 59.

It will also be appreciated that in the construction illustrated in Fig. 5, the shutter could control the burner by a rotary Inovement instead ofk an axialmovenient, or that by providing suitable openings in the shutter,

the manual control to determine Whether the y nism for such device need not be described in detail since it may take various forms, as Will be obvious to those skilled in the art.

Finally, it; Will be appreciated that although one type of burner has been referred to in the above description the invention is applicable to any other type of burner which it may be desired to use.

What I claim as my invention and desire to secure by Letters Patent is l. In a vulcanizer, the combination With a heating chamber, and heating-means for heating the same, of a slidable controlling member for the heating-means mounted so that it tends to move to diminish the heating effect of same, and retaining-means normally holding said controlling memberback against its tendency to move, and arranged to release the same under the automatic control of the heating chamber.

2. In a vulcanizer, the combination Witha heating chamber, and heating-means for heating the same, of a slidable controlling member for the heating-means mounted so that it tends to move to diminish the heating effect of the same, and retaining-means normally holding said controlling member back against its tendency to move and arranged to release the same under the automatic control of the temperature of the heating chamber.

3. In a vulcanizer, the combination With a heating chamber, and heating-means for heating the same, of a slidable controlling member for the heating-means mounted so that it tends to move to diminish the heating effect of the same, and retaining-means in the form of a yielding control that normally :trictionally holds said controlling member back against its tendency to move and is arranged to release the same under the automatic control of the heating chamber.

4. In a vulcanizer, the combination With a heating chamber, and heating-means for heating the same, of a controlling member that is slidable to regulate the heating ellect of the heating-means, a yielding control that tends always to move said controlling member to reduce said heating effect, and retaining-means normally holding said controlling member back against the action of said yielding control and arranged to releasev the same under the automatic trol of the heating chamber.

5. In a vulcanizer, the combination with a heating chamber, and heating-means for heating the same, of' a controlling member mounted to slide on a Wall of said heating chamber, and thereby regulate the heating elect of the said heating-means, and pressure-exerting means automatically controlled by the hea-ting chamber and arranged to normally press the controlling member against said Wall and hold it frictionally in its inoperative position.

6. In a vulcanizer, a heating chamber, and heating-means for heating the same, of a controlling member mounted to slide on a Wall of said heating chamber and thereby regulate the heating effect of the said heating-means, and a bimetallic spring automatically controlled by the temperature of the heating chamber and arranged to normally press the conthe combination With v trolling member against ksaid Wall and hold through said inlet, and a bimetallic spring arranged to press the shutter against its support and thereby-hold the same in its inoperative position, which spring is so situated as to be heated by the said heating chamber and is so arranged that its deformation, when heated, reduces the pressure on the shutter and permits the latter to fall under the action of gravity and thereby close said inlet.

f 8. In a vulcanizer, the combination With a heating chamber, and heating-means therefor having an inlet for air and an outlet for combustion products, of a gravity-actuated shutter that is movably mounted on said chamber to control the ilovv of air and combustion products through said inlet and said outlet, and a bimetallic spring arranged to normally press the shutter against its support and thereby hold the same in its inoperative position, Which spring is so situated as to be heated by the said heating chamber and is so arranged that its deformation, When heated, reduces the pressure on the shutter and permits it to fall under the action of gravity and thereby close said inlet and said outlet.

In testimony whereof I affix my signature. 

